[Limniscate]

How much resistance would I need to add to eliminate the noise floor that I can hear on my HE500 with the Emotiva?  Also, where can I get it?

 

[elwappo99]

Quote:

How much resistance would I need to add to eliminate the noise floor that I can hear on my HE500 with the Emotiva?  Also, where can I get it?

 
Well I have a premade 75 ohm one. When my new emo arrives in a few days I'll let you know if that one is enough. 

 

[SMG52]

I don't know anymore about this item than what the link to the website provides. But it looks like it can be purchased through the website, and that it's possible to contact the seller if people have specific questions.
 
In the review - I believe it was in  Stereophile - the reviewer overall liked what it did for a variety of headphones he tried with it, via the power amp he was using. But the headphones were not 'high end' models. 

 

[elwappo99]

Quote:

I just read about this adapter in a hi fi magazine yesterday at Barnes and Noble. Could have been Stereophile. I have no experience with it myself (I have a custom made adapter box made by the guy who designed the amp I am using). Just thought I'd pass this along FYI:
 
http://www.vinylflat.com/canopener.html

 
Definitely looks interesting. If no one else does I'll shoot them an email. The price isn't all that bad either, considering the chassis, binding posts, 1/4" TRS. 

 

[preproman]

I shot him a email already.  the only thing I asked is could the SE be replaced with a 4-pin XLR - he said no.  
 
 "Sorry, no - the printed circuit board and custom cabinet cut-outs are designed and manufactured for the existing terminations.  Regards,  John Martindale VF LLC"

 

[Terja]

Considering all the people hooking this speaker amp up to headphones, I think it's time to send a users petition in to Emotiva to put a TRS headphone out on this amp. That way those who want to use the speaker taps for hard to drive phones can do so and those with somewhat sensitive phones can use the headphone out. Seriously .... Just my one cent into the wishing well.

 

[preproman]

They will just tell you to buy the XDA-2 - It's said to have a kick ass headphone amp in it.  
 
IMO:  I think not..

 

[davidsh]

Quote:

 
Definitely looks interesting. If no one else does I'll shoot them an email. The price isn't all that bad either, considering the chassis, binding posts, 1/4" TRS. 

I hope they warn people against not using that box with ANY amp. Could make for some interesting results if it isn't shared ground...
 
Also wonder if they have designed that box in a proper way.

 

[Armaegis]

Quote:

I hope they warn people against not using that box with ANY amp. Could make for some interesting results if it isn't shared ground...
 
Also wonder if they have designed that box in a proper way.

 
I suppose if the ground terminals were tied together with resistors before connecting to the sleeve of the TRS, it would be ok. 
 
Unless the speaker amp were fully balanced / differential. It'd still work technically, but not well. 

 

[modulor]

You could technically modify the Can Opener - the panel mount 4-Pin XLR jacks by Neutrik would definitely fit (as what they already use is a Neutrik panel mount TRS jack so you could swap them out), then you should just have to rewire the inside with new resistors in a balanced config to the binding posts.  I believe if you were to use the Can Opener as is on a balanced speaker amp, your headphones would go boom (softly).  You can go balanced headphone to balanced OR unbalanced amp, but not the other way around.  The HE-Adapter on the other hand is already a balanced configuration with the 4-Pin XLR, so it would be a safer bet for all amps, so long as the headphones are also balanced (all HiFiMan's are by design for example).  The Can Opener will indeed work with the Mini-X though as it has a shared ground, so any headphone could be used in theory.

 

[Lohb]

Quote:

I read the whole thread..89 pages of it..I am eyeing myself an HE-500 for a very ling time now..I can source it locally here but it costs like $800..now the a100 will be the problem..shipping for sure will be hefty..anyway subscribing to this thread..very very informative thread

Well here is the solution. http://www.shipito.com. I just found this option the other day...........

 

[d1sturb3d]

^ thank you for the link..there is a similar option with out local carrier..I'll have to ask for quotations first..thanks again

 

[Armaegis]

Quote:

You could technically modify the Can Opener - the panel mount 4-Pin XLR jacks by Neutrik would definitely fit (as what they already use is a Neutrik panel mount TRS jack so you could swap them out), then you should just have to rewire the inside with new resistors in a balanced config to the binding posts.  

 
 
Unless the jacks are mounted on a pcb inside, which would making modifying trickier. Judging by the construction of the box, I don't think it's one continuous piece from the binding posts to the headphone jack though, so that's a plus. Still, if you have the knowhow to do such a mod, you might as well just make a pigtail adapter and do away with the box entirely...
 

 

[Hutnicks]

Quote:

I hope they warn people against not using that box with ANY amp. Could make for some interesting results if it isn't shared ground...
 
Also wonder if they have designed that box in a proper way.

No mention of using with internally bridged amps in the documentation or testing for common ground.

 

[modulor]

Quote:

 
 
Unless the jacks are mounted on a pcb inside, which would making modifying trickier. Judging by the construction of the box, I don't think it's one continuous piece from the binding posts to the headphone jack though, so that's a plus. Still, if you have the knowhow to do such a mod, you might as well just make a pigtail adapter and do away with the box entirely...
 

The main reason for the box is because the high power capacity resistors for parallel configuration can be fairly large.